Here is a copy of the instructions I send out with my Custom Brushes hope it helps you
How to Care for Your New Brush
General care, for Wood and Antler brushes, I use Renaissance Wax usually every 3 months, on the body of the brush..
The Knot needs to be broken in, they tend to have a wet dog smell for a few days, I eliminate the dirt and much of the smell before I use the brush on my face by following these easy steps.
1. In the sink or a bowl filled with hot water add some 20 Mule Team Borax (I add about ½ cup to the full bathroom sink) and wash out the brush, repeat..
2. Take the brush into the shower with you and Shampoo twice and use Cream Rinse once, then rinse well
I do this to every new brush I have and it seems to really help